Principal Software Development Engineer in Test (SDET)
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Principal Software Developer in Test (SDET)
Location: London (Hybrid) | Practice Area: Technology & Engineering | Type: Permanent
Drive test automation innovation and engineering excellence in financial technology
The Role
As a Principal SDET at Capco, you'll lead the strategy, architecture, and implementation of robust automation testing frameworks across financial services projects. You’ll work closely with cross-functional teams to deliver quality-first solutions using the latest tools and practices. You’ll also mentor engineers, foster best practices in test automation, and help shape our quality engineering capability.
What You’ll Do
- Architect reusable, scalable test strategies and frameworks across web and mobile platforms
- Design, build, and maintain test automation scripts for UI, APIs, and services
- Integrate testing tools into CI/CD pipelines and manage cloud-based testing solutions
- Lead test data management, performance/load testing, and accessibility verification
- Mentor junior engineers and influence organisation-wide testing strategy and tooling
What We’re Looking For
- Strong experience in UI and mobile test automation using Selenium, WebDriver, Cucumber, or Robot
- Proficient in API testing (REST/SOAP) and tools like Postman or JMeter
- Experience with cloud-based test platforms such as BrowserStack, Sauce Labs, or Appium
- Solid understanding of test lifecycle tools such as Jira, Jenkins, GitHub, SonarQube
- Strong knowledge of HTML, JavaScript, CSS, ReST, JSON, and accessibility standards
Bonus Points For
- Development background and coding experience in Java, Ruby, or Python
- Load and performance testing experience using JMeter, LoadRunner, or Performance Center
- Cloud platform exposure (AWS, Azure, OpenShift, PCF)
- Experience with DevOps practices, Agile methodologies, and AAA accessibility standards
- Experience migrating on-premise systems to cloud ecosystems
Why Join Capco
- Deliver high-impact technology solutions for Tier 1 financial institutions
- Work in a collaborative, flat, and entrepreneurial consulting culture
Benefits
We offer a competitive, people-first benefits package designed to support every aspect of your life:
- Core Benefits: Discretionary bonus, competitive pension, health insurance, life insurance and critical illness cover.
- Mental Health: Easy access to CareFirst, Unmind, Aviva consultations, and in-house first aiders.
- Family-Friendly: Maternity, adoption, shared parental leave, plus paid leave for sickness, pregnancy loss, fertility treatment, menopause, and bereavement.
- Family Care: 8 complimentary backup care sessions for emergency childcare or elder care.
- Holiday Flexibility: 5 weeks of annual leave with the option to buy or sell holiday days based on your needs.
- Continuous Learning:
Inclusion at Capco
We’re committed to making our recruitment process accessible and straightforward for everyone. If you need any adjustments at any stage, just let us know – we’ll be happy to help. We value each person’s unique perspective and contribution. At Capco, we believe that being yourself is your greatest strength. Our #BeYourselfAtWork culture encourages individuality and collaboration – a mindset that shapes how we work with clients and each other every day.
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